What physiological changes can occur during hibernation

When a species goes into hibernation, the heart rate drops drastically, and the body temperature does as well, in order to conserve energy.  The body becomes induced into a comatose state by releasing chemicals from the brain to body to go into sleep mode.

Explanation:

Hibernation usually occurs during the winter.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;